Our dryer started blowing the breakers last week. Would run for about 10-15 minutes then blow the breakers. After researching possible causes I pulled the heating element and couldn't find any sign of a break or snag. Thought maybe I had weak breakers so I got two new 30amps and installed them. I also took the lint tray housing and vent hose off and cleaned them. They were pretty clean and I found no blockage of air. I started the dryer back up and it ran fine about 15 minutes so I figured I would start hauling my tools back out to the garage. Just got outside and my wife started screaming there was smoke in the basement. Boy was there every. The clothes were so hot you could hardly touch them. Stupid me, I laid the vent on the floor instead of back outside and it blew all that smoke into the basement. Scary thing was the breaker never blew and the dryer was still running. Today I tore the whole thing apart and checked for burn marks and smoke residue...nothing. The drums ring look fine, no marks from a spinning belt burning and the motor and no sign of over heating on the core or plastic fins. I figured with that much smoke it would be a motor, belt, lint, rollers or something plastic. It had a smell of plastic/rubber. Any ideas what would have cause the extreme heat? Could the element staying on cause cause it to smoke? We didn't notice any of the clothes singed or burnt.